Ignition device for gas burners



.Iuine' 29, 1937. c. E. METHUDY IGNITION DEVICE FOR GAS BURNERS FiledFeb. 12, 1931 II/TII/ IIIIIIVIIIIIII Patented June 29, 1937 IGNITIONDEVICE FOR GAS BURNERS Carl E. Methudy, St. mesne assignments,

Company, Cleveland, Ohio, a corporation of Ohio.

Application February 1 9 Claims. This invention relates to ignitiondevices for as stoves.

An object of the invention is to provide an improved ignition device foruse in connection with gas stoves comprising a housing designed andadapted to enclose a constantly burning pilot light jet and having tubesopening and 'extending from the housing to positions to receive gaspassing through and from the usual gas burners and to conduct the gas tothe pilot light housing for ignition and to conduct the pressure wave ofignition to the gas burners, in combination with means in the pilotlight housing for protecting the flame of the constantly burning pilotlight jet from being extinguished by the explosive ignition of gas orotherwise in a more satisfactory manner than has heretofore beenaccomplished.

Another object of the invention is to provide a pilot light housing foruse on gas stoves comprising a housing adapted to encase a constantlyburning pilot light jet and having laterally extended tubes ,openingtherefrom'for the purpose hereinafter indicated, in combination with apair of annular discs arranged and supported within 7 the housing in anovel relationship to the jet and to the openings tothe tubes in orderto protect the flame of the jet from being extinguished, and to bafliethe gas entering the housing in such a way that the gas will beeffectively ignited, and to cooperate with the remaining elements insuch a way as to discharge the obnoxious fumes of burnt gas from thehousing.

Other objects will appear from the'following description, referencebeing made to the accompanying drawing, in which' Fig.1 is a plan viewof one form of the in-.

vention in a gas stove.

Fig. 2 is an enlarged vertical sectional view of the device.

Fig. 3 is a vertical sectional view on a plane angularly intersectingthe plane of the section of Fig. 2 approximately at the center of thepilot light housing.

Fig. 4 is an enlarged'sectional view on the same line as the section ofFig. 3 showingthe pilot light housing without the bafiie discs therein.

Louis, Mo., assignor, by to The Cleveland Trust 2, 1931, Serial No.515,150

igniting gas at the gas burners and at the oven burner. a j

As shown in the drawing, the gas manifold I is supported adjacent to theburner box 2 within which there is acluster of gas burners, such as thegas burner 3. The gas burners 3 are supplied with gas from the manifoldI through pipes 4 controlled by valves 5, so that the burners 3 may beselectively supplied with gas, as is familiar.

Side walls 6 of the oven are toward the burner b0); frame. A gas burner'l is supported within the oven and is supplied with gas through acommunication 8 from the manifold l. The communication 8 is controlledby a valve 9.

The housing I0 is designed and adapted to enclose the jet H of a pilotlight burner device to which gas isconstantly supplied through a pipe 12from the manifold l controlled by a normally open valve l3. The jet l Iis centered in the lower portion of the housing I0 by spaced lugs I 4integral with the lower. end of the wall of the housing and projectinginwardly. These lugs M are spaced so as to provide openings throughwhich air may freely enter the lower end of the pilot light housing inorder to supplythe air necessary to prevent the pilot light jet flame l5from being extinguished.

The housing ll] opens into a number of tubes I 6 which project towardthe respective burners 3 and have flanges l8 on the under side of theirouter ends arranged to seat upon projections I9 from the respectiveburners 3. Fingers 20 at the outer ends of the respective tubes l6embrace the adjacent projections l9 between them. In this way, the pilotlight housing is supported in cooperative relation to the burners 3, sothat gas passing from said burners through the laterally disposed gasoutlets 2| will necessarily enter the respective tubes l6 and passtherethrough into the housing. This is because the openings 2| areopposite the open ends of the tubes l6, so

that gas passing from said openings 2i must necessarily enter the tubes,These holes 2| are provided specially and in addition to the holes 22 inthe upper walls of the burners 3. It is necessary only to provide one ofthe special holes 2| in each burner.

The housing In is formed with an internal shoulder 23'immediately belowthe openings into the tubes I6. The annular disc 24 is mounted -in thehousing I ii on the shoulder 23 and the opening 25 through said disc 24is surrounded by an upwardly extended flange 26 that tapers upwardly.The jet l4 is'below the plate 24 and the constantly burning flame l6extends through the opening 25 to a height above the flange 26. Thisdisc 24 located pn the shoulder 23 below the openings to the tubes |6prevents the gas en- 5 tering the housing l3 from the tubes l6 frompassing downwardly, and the flange 26 shields and guards and protectsthe flame I6 from the effects of the ignition waves or gusts created asan incident to ignition of gas entering the housing I0 10 through any ofthe tubes I6.

The housing ID has an internal shoulder 21 above the shoulder 23. Theshoulder 2ll intersects thetubes I6 approximately at the axis of saidtubes, it being apparent that in the embodiment shown the openings toall of the tubes l6 are approximately in the same horizontal plane. Aflaring annular plate 26 is mounted on the shoulder 21, the opening 23through said plate being in vertical axial alinement with the openmg 25and surrounded by an upwardly tapered flange 30. The opening 29 is oflarger diameter than the opening 25 and the flange 33 is of greaterlength than the flange 26. It is unnecessary that the constantly burningflame l5 extend 25 normally above the upper edge of the-flange 30 inorder to maintain the device in successful operation. I L

A tubular extension 3| opening from one side of the housing It isprovided on its end with a v 30 bell 32 designed and adapted to receiveone end of the tube 33 having its opposite end opening into a burnerhousing 34 having communication through a pipe 35 with the pipe 8 andwith the burner I through a tube 36. Thus, gas may be conducted into thehousing HI through the tube 33 and the connections for supplying gas tosaid tube.

The housing it may be formed with a number of vent'opem'ngs 31intersecting the disc 28 in order to supply enough air to meet anyrequirements.

A cover plate 36 telescopes upon the upper end of the housing In and isprovided with a large central opening 39 and an annular series ofopenings 46 to permit free escape of burnt gases and products ofcombustion in order to maintain the device in perfect operation.

This device is designed and adapted to be mounted in cooperativerelation to a cluster of gas burners 3, witha constant supply of gas tothe jet II, which hasa constantly burning flame I5, to consumeconstantly the small amount of the baflle plate 24. A part of the gasentering] the housing l3 will pass below the battle plate'28.

The gas coming into contact with or in proxim-.

ity to the flame l5 within the pilot light housing III will be ignitedand the pressure wave of ignition will be deflected outwardlyithroughthe gas filled pipe |6 by the curved lower surface of the baflie plate28. The pressure wave of ignition is directed above the upper wall ofthe burner 3 into contact with the gas emerging from the holes 22 withthe result that the gas emerging from all of said holes 22 is ignited.Also, the gas emerging from the hole 2| is ignited.

The jet flame I5 is guarded and shielded and protected by the baflieplate-24 and the upwardly curved flange 26. The jet flame I5 is therebythoroughly shielded and guarded and protected from any subsequent inrushof air, so that said flame I5 is not extinguished.

Since the edges of the plate 26 intersect the openings to all of thepipes l6 as well as to the tube 3| and also the vent openings 31, saidbaffl plate 28 does not cause any or the obnoxious gases resulting fromthe combustion oi. the gas to be retained in the housing It; but, on thecontrary, said 'baflle plate 28 causes all of the obnoxious gases to bedischarged. This is because fresh air may enter the housing l3 above andbelow the baifle plate 23 so as to carry all burnt gases and products ofcombustion from the housing l6. It is now clear that my inventionobtains all of its intended objects andpurposes in a most eflicient andsatisfactoiymanner. The construction, arrangement and relationship ofthe parts may be varied within the scope of equivalent limits withoutdeparture from the nature and principle of the invention.

I claim:--

1. In a device of the character described, a

housing having a lateral opening, a jet within said housing below theplane of the bottom of said opening, and a horizontal baiile plateintersecting said opening'and having a central opening above said jetand above the normal height of the flame of the jet.

'2. In a device of the character described, a

housing, a pipe opening into said housing for conducting gas into saidhousing and for conducting the pressure waveof ignition of said gas fromsaid housing, a jet within said housing, a bafile plate in said housingintersecting the opening to said pipe andhaving a central opening abovesaid jet and above the normal height of the flame of said jet, anda-baflle device in said housing below the opening to said pipe andhavintegral with said plate around said opening therethrough extendingabove the bottom wall of the opening to said pipe, an annular plate.supportedin said housing and intersecting the opening to said pipe, andan upwardly extended flange around the openingin saidannular plateextend-' ing upwardly above the plane of the-top oi the opening to saidpipe.

4. A device oi the character described com-- prising a housing, a Jetwithin the lower end of said housing, means holding said housing andsaid jet in properly spaced relationship and forming openings-admittingair into the lower end of the housing, a pipe 'openingirom said housing,a bafiie'plate in said housing below the opening to said pipe and havinga central opening above said jet, an upwardly tapered flange surroundingsaid opening in said baflle plate and extending above the lower side ofthe opening to said pipe, an annular baflle plate supported in saidhousing and intersecting the opening to said pipe, and-an upwardlytapered flange surrounding, a jet in the lower portion of said housing,an annular baffle plate in said housing below the opening to said pipeand below, said air inlet opening, an upwardly tapered flangesiu'rounding the opening through said annular ballle plate,v a secondannular baflle plate in said housing intersecting the opening to saidpipe and said air inlet opening, and an upwardly tapered flangesurrounding the opening through said second baflle plate.

6. In a device of the character described comprising an open top pilotlight housing having one or more flash-back tubes extending from thesides thereof, and a pilot light enclosed by the housing whereby toignite gas conducted into the housing through said tubes, a baflie insaid housing having an opening provided therein for projectiontherethrough of the flame oi the pilot light, the baille having theopening therein defined by an upwardly projecting annular flange sodisposed with relation to the flame of the pilot light as to leave onlythe tip of the flame exposed above the same in the housing, whereby toprotect the main portion of the flame from concussion produced in thetubes.

7. In a device of the character described comprising an open top pilotlight housing having one or more flash-back tubes extending from thesides thereof, and a pilot light enclosed by the housing whereby toignite gas conducted into the housing through said tubes, a bame in saidhousing having an opening provided therein for projection therethroughof the flame of the pilot light, the indie having the opening thereindeflnedby an upwardly projecting annular flange so disposed withrelation to the flame of the pilot light as to leave only the tip of theflame exposed above the same in the housing, whereby to protect the mainportion of the flame from concussion produced in the tubes, and saidbaflle being furthermore so disposed so that the flame of the pilotlight projects substantially centrally through the flanged openingwhereby to produce a nozzle efl'ect to draw in secondary air for theflame to support combustion.

8. In a device of the character described, an ignition means including ahousing having an opening through its top wall, a jet within saidhousing, a horizontal baiile plate below said top opening and having anopening above the nor-, mal height of the flame of said jet, and ahorizontal baflle plate below the other plate situated in the normalpath of the flame of the jet and having an opening above the jet andbelow the normal height of the flame of said jet.

9. In a device of the character described, ignition means for igniting agas stream including a flxed jet for supporting a gas pilot flame, and amember having an opening provided therein for projection therethrough ofthe flame of said Jet, said member having the opening thereof defined byan upwardly and inwardly projecting annular flange so disposed withrelation to the flame of said'jet as to leave only the tip of the flameexposed above the same, whereby to protect the main portion of the flamefrom concussion produced by the ignition of the gas stream, said memberbeing so disposed that the pilot flame projects substantially centrallythrough said opening whereby to produce a nozzle effect to draw insecondary air for the flame to support combustion. D

CARL E, MEI'HUDY.

